Well, the smart2go beta is now live and you can begin downloading now. About a year ago I had reviewed smart2go for both the Pocket PC, Smartphone and System 60 phones and met with the folks bringing it to the United States before it was acquired by Nokia. It was pretty good and loved the natural zooming in and out as you made turns and the small footprint of the maps. The next version so far is free (Navigation upgrades and guides look to be $7.99) and it now has updated maps and a cleaner UI. It has the same Find See Do, City guides available as well.
It is definitely worth checking out if you are looking for an affordable GPS system. You can download it directly from here.